铲子坪金矿区钻孔严重弯曲的力学机制定性分析

A Qualitative Analysis on Reasons for the Serious Hole Deflection in the Chanziping Gold Mining District

文章介绍了施工区地质概况;总结了钻孔弯曲规律和治斜效果;从力学观点分析了钻孔方位角和顶角变化的原因;提出了硬岩钻进的工作方法和防斜措施.

The geological setting of the mining district, deflection regularity of holes drilled and effectivenessof hole deflection rectification are introduced in this paper. The reasons for large variations of azimuthal and zenithal angles of holes drilled are investigated with a view point of mechanics. In the lastpart of the paper the author proposes his suggestions on drilling method in hard rock area and measures taken for prevention of hole deflection.